Sheet rolling device



Feb. 12, 1963 E. c. WELLS ETAL SHEET ROLLING DEVICE INVENTORS 4Sheets-Sheet 1 Filed June 7, 1960 Feb. 12, 1963 E. c. WELLS EI'AL3,077,316

SHEET ROLLING DEVICE Filed June 7, 1360 4 Sheets-Sheet 2 w- R I l l k II" h g l l l Q 1| QI L\ h w h I Q J R S: g I

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Feb. 12, 1963 E. c. WELLS ETAL 3,077,316

SHEET ROLLING DEVICE W TORS. E D W490 Vl%14s. AZ/ WAPD C. P0550750.

J. m" i g k I S v ,qrro /vfx SHEET ROLLING DEVICE 4 Sheets-Sheet 4 FiledJune 7, 1960 EON/K790 mm W United States Patent Ofiice pany, Inc., MountProspect, Ill., a corporation of Delaware Filed June 7, 1960, Ser. No.34,443 Claims. (Cl. 242-65) This invention relates to a sheet rollingdevice and more particularly to a device for rolling up tracings whichhave passed through a printing or duplicating machine.

It is conventional to store sheet material such as tracings, forexample, either flat, or in roll form, with the face of the sheetprovided with a set curl referred to in the art as a face-in curl, whichin this specification will be hereinafter referred to as a face curl, orwith the back of the tracing provided with a set curl, commonly termed aback-in curl, hereinafter referred to as a back curl. After feeding suchtracings through a printing, duplicating, or other machine in flat form,it is often desirable, at least in the case of previously rolledtracings, to re-roll the same for storage in accordance with theirinitial curl. Alternatively, the tracings, after duplication thereof,may desirably be fed flat to a receiving tray for stacking and storage.

It is an object of this invention to provide a sheet rolling device forrolling up sheet material such as tracings passing out of printing,duplicating, or other machines so that the sheet material is rolled upin accordance with its original curl, thus minimizing Wear anddistortion of the sheet material, in that it is not subjected to forcesintroducing additional curling stresses.

A further object of the invention is the provision of such a devicewhich is adapted to deliver tracings fiat or to roll them up with eithera face or back curl.

Other objects and advantages of the invention Will be apparent from thefollowing detailed description thereof.

The sheet rolling device of this invention comprises, a feed means foradvancing the sheets, a plurality of movable guide fingers for guidingthe advancing sheets positionable to guide the moving sheets to producea face curl or back curl or toone or more idle positions where they haveno guiding function and the sheets are fed substantially fiat, and afeed roller, rotatable in opposite directions, for rolling the sheetswith face or back curls as desired, depending upon the position of theguide fingers and the direction of rotation of the feed roller.

In the accompanying drawings forming a part of this specification andshowing, for purposes of exemplification, a preferred form of thisinvention without limiting the claimed invention to such illustrativeembodiment:

FIGURE 1 is a vertical cross-section through a portion of a duplicatingmachine, showing a sheet rolling device according to this invention,with the guide fingers positioned for rolling up sheet material such astracings having face curls to re-roll them with such curls;

FIGURE 1a is a fragmentary cross-section of the sheet rolling device ofFIGURE 1, showing the guide fingers in position for rolling up tracings,having back curls to re-roll them with such curls;

FIGURE lb is a view similar to FIGURE 1a with the guide fingers in theiridle position for feeding the tracings in fiat form;

FIGURE 2 is a front elevation, partly in section, of the sheet rollingdevice taken along the line 2-2 of FIG- URE 1;

FIGURE 3 is a plan view of the lower assembly of the sheet rollingdevice, taken along the line 33 of FIG- URE 1b;

FIGURE 4 is a vertical section through the lower ashaving spaced discs27 mounted thereon.

3,077,316 Patented Feb. 12, 1963 sembly of the sheet rolling device,with the lower guide fingers in the idle position; and

FIGURE 5 is a vertical section similar to FIGURE 4 with the lower guidefingers elevated to the face or back curl position.

Referring first to FIGURE 1, a portion of a known duplicating machine isshown, comprising a light transmitting printing cylinder 10, withinwhich is located a lamp 11 and a ventilating duct 12. As conventional,the printing cylinder is mounted for rotation about its axis. Endlesscarrier bands or tapes 13 pass thereover, along with auxiliary feedbelts 14 from adjacent a feed board 15 to the printing cylinder 10. Thesuperposed feed belts and endless bands form a traveling platform forreceiving sheets, such as tracings 16, and sensitized copy papers 17,and for conveying the assembly comprising the superimposed tracings andcopy papers to the printing cylinder 10. The tracings and copy papersare passed around the light transmitting portion of the printingcylinder by the endless bands or tapes 13 and the sensitized copy papers17 are there exposed through the tracings 16. The endless band conveysthe exposed sheets past a sheet separating device, indicated generallyat 18, which may be of any well known structure, such as that disclosedin Streich, US. Patent 2,441,912, granted May 18, 1948, for example. Thecopy papers 17, separated from the tracing 16, pass upwardly With theendless bands 13, over a roller 19 and then to a conventional developingdevice, not shown, or to the delivery point, if development isunnecessary. The separated tracings 16 pass through the sheet rollingdevice of the present invention, indicated generally by referencenumeral 20, to be described in more detail hereinafter, in which thetracings are rolled in accordance with their original curl, i.e., witheither a face or back curl, as the case may be, or are fed fiat, asdesired. The tracings, when fed flat, pass over rollers 21 to areceiving tray 22, as shown in FIGURE 1b.

The sheet rolling device is a self-contained unit suitable for usewherever desired. As shown in FIGURES 1 and 2, the embodiment utilizedwith the duplicating machine of FIGURE 1, includes a hinged feed shelf23 over which the tracings 16 are fed by a pair of feed rollersconsisting of a feed roller 24 having spaced feed rings 25, desirably ofrubber, and a cooperating feed roller 26 The discs 27 are preferablyformed of a smooth high friction material, such as rubber, for example,and have in their periphery a series of peripheral notches 28 forcorrugating or ribbing the tracings to facilitate feeding to thereceiving tray 22, when the guiding fingers of the sheet rolling deviceare in the idle positions, as will be more fully described hereinafter.

The cooperating feed roller 26, best shown in FIGURE 2, is mounted forrotation about a shaft 29 in bearings 30 at the ends of the shaft 29.Each of these bearings 30 is mounted in a bearing support or spacer 31which is fixed to the shaft 29 for rotation therewith by a set screw31a. A number of the discs 27 (six are shown by way of illustration inFIGURE 2) are spaced along the length of the cooperating feed roller 26by spacers 32 and are held in place by rings 33, desirably of metal, thelatter being of smaller diameter than the discs 27 and disposed onopposite sides thereof. Additionally, a pair of drive wheels 34 of atough, abrasion-resistant material, such as nylon, for example, aremounted on the bearing spacers 31 at the ends of the cooperating roller26 and fixed thereto by set screws 34a.

The feed roller 24 is driven from a motor, either directly or through aconventional belt or chain drive. Feed roller 24, in turn, drives thecooperating feed roller 26 through drive Wheels 35, raised portions 35aof the drive wheels driving the cooperating roller when rolling thetracings, and lowered portions 35b driving the cooperating roller whenfeeding the tracings in substantially flat condition.

Slightly above and to the left of the cooperating feed roller 26,viewing FIGURE 1, is a mounting tube 36 supporting a number of upperguide fingers 37, Each upper guide finger, which is suitably secured tothe mounting tube 36 as by a set screw 38, is pivotally linked to afinger extension 39 by a screw 40 having a finger spacer 41 thereon. Thefinger extension is arcuate shaped and includes a convex surface 39a anda concave surface 39b, for guiding tracings fed into the rolling device,as will appear hereinafter. While three upper guide fingers and fingerextensions are shown in the drawings, it will be understood that anynumber may be employed, depending upon the width of the pathway throughthe sheet rolling device and the widths of the tracings to be passedtherethrough.

The mounting tube 36 (FIGURE 2) is' mounted for pivotal movement on anupper finger shaft 42. Pivotal movement of the mounting tube about shaft42 is effected by either of a pair of knurled collars 43 attached to themounting tube 36 by set screws 44. Each end of the shaft 42 is attachedto a pivoted arm 45 by a head screw 46. Immediately adjacent the rightpivoted arm 45, as viewed in FIGURE 2, a setting block 47 is fixed tothe mounting tube '36 by a set screw 48. The setting block 47 includes aspring loaded ball plunger 49 locking in an aperture 56 in the rightpivoted arm 45. Several such apertures are provided in the right pivotedarm radially of the support for the upper finger shaft 42 and themounting tube 36. Thus, the mounting tube 36, upon pivotal movementeffected by turning either of the knurled collars 43, is locked in anyof a number of predetermined positions by the ball plunger 49 engagingone of the apertures 50 in the right pivoted arm 45. The locations ofthe apertures in the right pivoted arm 45 are such as to position theupper guide fingers 37 and finger extensions 39, which fingers 37 areattached to the mounting tube 36, in the face curl, back curl, and idlepositions thereof, as shown in FIGURES 1, 1a and lb, respectively.

The shaft 29 is joined to the pivoted arm 45 by head screws 51. Theshaft 29 and the upper finger shaft 42, together with the elementsthereon, comprise a unitary upper assembly 52. As may be seen in FIGURES1, la, lb and 2, the upper assembly 52 is positioned contiguous to andabove the feed roller 24.

The upper assembly 52 is pivotally mounted on the side walls of theduplicating machine by a pair of pivot pins 53 (see FIGURE 1) extendingbetween the side walls of the duplicating machine and the adjoiningpivoted arms 45. Each of the pivot pins 53 has one end fixed to thepivoted arms 45 and the other end mounted in a slot in the frame of themachine to permit movement of the upper assembly relative to the frameof the duplicating machine.

The upper assembly 52 is mounted so that it can be moved to one of twopositions. In one position, which will hereinafter be termed the upperposition, for rolling tracings passed between the feed rollers 24 and26, the

peripheral edges of .the feed rings 25 on the feed roller 24 and theperipheral edges of the discs 27 on the cooperating feed roller 26extend only to the plane of the tracing 16 (as shown in FIGURE 2). Inthis upper position, the raise-d portions 35:: of the drive wheels 35 onthe feed roller 24 are in driving engagement with the drive wheels 34 ofthe cooperating feed roller 26-.

In the second or lower position of the upper assembly 52, whichfacilitates feeding the tracings in substantially fiat form through thedevice, the peripheral edges of the feed rings 25 on the feed roller 24extend slightly above the peripheral edges of the discs 27 on thecooperating feed roller 26. In such lower position, the feed rings 25and discs 27 slightly corrugate or rib the tracing to facilitate feedingand delivery to the receiving tray 22, where the tracings are stacked insubstantially flat form. When the upper assembly 52 is in the lowerposition, the smaller diameter portions 35b of the drive wheels 35 onthe feed roller 24 engage and drive the drive wheels 34 of thecooperating feed roller 26.

Desirably, the upper assembly is mounted for ready positioning into theupper and lower positions described above, by a bracket 54 secured byscrews 55 to a side wall section 56 of the duplicating machine adjacentto and below the left pivoted arm 45. A bracket extension 57, at rightangles to the bracket 54, is provided with a raised portion or shelf 57aand a ledge 57b. As shown in FIGURE 2, when the drive wheels 34 on thecooperating feed roller 26 engage the raised portions 35a of the drivewheels 35 on the feed roller 24 (viz. the upper position of the upperassembly 52), the left pivoted arm 45 rests on the raised portion 57a ofthe bracket extension 57. In the lower assembly position described,i.e., when the drive wheels 34 engage the smaller diameter portions 35bof the drive wheels 35, the left pivoted arm 45 rests on the ledge 57bof the bracket extension 57.

A pair of handles or knobs 58, mounted on the pivoted arms 45 by screws59 having spacers 66 thereon, are utilized to move the upper assembly 52from one to the other of the two positions described above. The handles58 effect pivoting of the upper assembly about the pivot pins 53 topivot the left pivoted arm 45 thus moving the lower edge thereof abovethe raised portion 67a of the bracket extension 57 and also moving thedrive wheels 34 above the raised portions 35a of the drive wheels 35.The handles then are utilized to effect sidewise displacement of theupper assembly. The upper assembly 52, if in the upper position, shownin FIGURE 2, can thus be moved to the lower position with arm 45 restingon ledge 57b, in which position the shoulder at right angles to ledge57]; prevents lateral movement to the right, viewing FIGURE 2 of theupper assembly. The assembly is moved in reverse direction insubstantially the same manner.

The sheet rolling device includes a lower assembly 61 assisting infeeding the trackings 16-. The lower assembly comprises a supportinghousing 62 (FIGURES 4 and 5) having a rear tray section 63, a mountingsection 64 and a front tray section 65. The lower assembly 61 ispositioned contiguous to and below the feed roller 24.

The rear tray section 63 is provided along its upper edge with a numberof upstanding portions 66 separated by slots 67 (FIGURES 2 and 3),through which slots the feed rings 25 on the feed roller 24 rotate. Theupstanding portions 66 of the rear tray section prevent the tracings 16from being carried behind the feed roller by the feed rings 25. At theends of the rear tray section, a pair of brackets 68 having cut-outs 69are provided for attaching the lower assembly to the side Walls of theduplicating machine as, for example, by hexagonal head screws 70, asshown in FIGURES 4 and 5.

A cover plate 71 having a number of slots 72 spaced along the lengththereof is mounted on the mounting section 64 of the supporting housingwith the aid of brackets '73 and screws 74 (see FIGURES 3 and 5). Thecover plate is so positioned as to prevent snagging the leading edges ofthe track-ings 16 on the lower finger shaft described hereinafter.

The front tray section 65 of the supporting housing has a number ofT-shaped slots 75 positioned along its length; the leg portion of eachof the slots is aligned with one of the corresponding slots 72 in thecover plate 71 (see FIGURE 3). The front tray section is providedadditionally with a pair of aligning knobs 76 (FIGURES 1 and 3) spacedalong the length of the section for guiding the tracings 16 as they arefed out of the sheet rolling device.

ment Within the supporting housing 62; the shaft is jour-' nalled at itsends in sockets 78 which are, in turn, attached to brackets'70; thebrackets are held fixed relative to the supporting housing by screws 80.As shown in FIGURES 2 and 3, sidewise'displacement of the lower fingershaft is preventedby the provision of a collar 82 immediately adjacentthe socket 78.

A number of lower guide fingers 83 are attached to the lower' fingershaft 77 at spaced points by mounting collars84 secured thereto by setscrews 85. Each of the lower guidefing'ers has an upper planar surface86 and a lower concave arcuate guiding surface 87, the latter surfacedesigned to guide the tracings 16 during rolling thereof. The lowerguide fingers are each aligned with one of the lateral slots 72 in thecover plate 71 and with the corresponding leg elements of each of theT-shaped slots 75 in the front tray section 65. The fingers are thuspivotable through an are extending through and above the plane of thecover plate. It will be noted that, like the upper guide fingers 37, anynumber of the lower guide fingers83 may be employed as desired,depending upon the width ofthe pathway through the sheet rolling deviceand the widths of the tracings to be passed therethrough.

Adjustment of the lower finger shaft 77, together with the attachedlower guide fingers 83, is effected by a knurled collar 88 mounted onthe fingershaft with a set screw'89 and housed within an opening 90 inthe cover plate 71'. The pivotal movement of the finger shaft isrestricted by a pair of stop collars 91 and 92 and the brackets 93 and94 associated therewith supported on the mounting section 64.

As seen in FIGURES 3 and 4, the stop collar 92 has a dowel pin '95 whichturns as the lower finger shaft is turned by the knurled collar 88. Thepivotal movement of the shaft is limited in one direction by engagementof the dowel pin 95 with an inwardly extending flange 96 of the bracket94. When the dowel pin 95 engages the flange 96 the upper planar surface86 of each of the lower guide fingers 83 is positioned in the planedetermined by the cover plate 71 and the front tray section 65. It isimportant that the rear surfaces of the cover plate and the front traysection be coplanar and in alignment with one another, and that theupper surfaces of the lower guide fingers 83 be pivotable into the planeof these surfaces, and yet not rotate further than this limitingposition, so that the lower guide fingers when so positioned serve toguide the tracings for delivery to the receiving tray 22 insubstantially fiat form without snagging the leading edges of thetracings. The aforesaid limiting position is an idle position withrespect to the rolling or curling of the tracings 16, i.e., as shown inFIGURE 4,

with the lower guide fingers in the plane of the cover plate and thefront tray section, the tracings 16 are not curled but are rather fed toform for stacking.

The stop collar 91 having a dowel pin 97 therein, as

the receiving tray in sheet shown in FIGURES 3 and '5, limits themovement of the lower finger shaft'7'7 by engaging an inwardly directedflanged 98 of the bracket 93. When'the dowel pin 97 engages fiange'98,the lower guide fingers 83 fixed to the lower finger shaft, arepositioned, as shown in FIGURE '5. In this position of the lower guidefingers, frictional contact thereof with the feed roller 24 does nottake place, and the arcuate guiding surfaces 87 of the lower guidefingers are positioned for re-forrning face or back curls on the tracing16, as discussed hereinafter. i A lower feed roller99 is journalled onball bearings 100 which are mounted in ball bearing housings 101. Theball bearing housings are, in turn, mounted on the brackets '79 securedto the supporting housing 62. The

lower feed roller is driven by a drive wheel 102, desirably havingrubber peripheral surfaces, which is frictionally driven: The drivewheel 102 is driven from any mechanisms are well known in the art, it isbelieved unnecessary to further describe them.

A number of discs 103, desirably of rubber, are located in pairs atspaced distances along the length of the lower feed roller 99. Each pairof discs is positioned in alignment with one of the T-shaped slots 75 ofthe front tray section 650i the supporting housing 62, as shown inFIGURE 3. The members of each pair of discs are spaced apart on opposedsides of the plane of the lower guide fingers 83 which, as describedabove, are aligned with the leg elements of the T-shaped slots. Thediscs 103 serve to feed the tracing 16 through the sheet rolling deviceand aid in the re-rolling with face curls and back curls, as desired.

In the operation of the sheet rolling device of the invention, a tracing16 and copy paper 17 are fed through the duplicating machine and areseparated after printing by the sheet separating device 18. Thereafter,the separated tracing is fed over the feed shelf 23 and between the feedroller 24 and the cooperating feed roller 26.

In order to re-roll a tracing originally having a face curl, the handles58 are actuated to pivot the upper assembly 52 about the pivot pins 53;the upper assembly is then displaced (into its upper position) so thatthe drive wheels 34 engage the raised portions 35a of the drive wheels35 (see FIGURE 2) and the peripheries of the feed rings 25 and discs 27extend to the plane of the tracing. Either of the knurled collars 43 isthen turned and snapped in place by the ball plunger 49 seating in theaperture 50, with the upper guide fingers 37 and the finger extensions'39 pivoted into the position shown in FIGURE 1. The lower guide fingersare then pivoted into the elevated position of FIGURE 1 by movement ofthe knurled collar 88. The conventional motor drives for the feed roller24 and the lower feed roller 99 are then engaged; in order to re-form aface curl, the feed roller 24 is rotated counter-clockwise while thelower feed roller 99 is rotated clockwise. Of course, it will beunderstood that each of the feed rollers may be engaged by a commondrive mechanism, provided suitable gearing for varying the rates anddirections of rotation is provided.

The tracing is fed between the feed roller 24 and the cooperating feedroller 26 and is guided by the slightly downward curvature of theconcave surfaces 39b of the finger extensions 39 into acounter-clockwise or face curl. The rotating discs 103 on the lower feedroller 99 drive the tracing into contact with the elevated concaveguiding surfaces 87 of the lower guide fingers 83 and feed the tracinginto a continuous roll. As the tracing is rolled, it will be noted thefinger extensions 39 of the upper guide fingers 37 pivot slightlyoutward of the roll to account for the increased size thereof. Theformed roll is thereafter removed manually.

To re-roll tracings originally having a back curl, the upper assembly 52and the lower guide fingers 83 are positioned as described above inconnection with the re-forming of a face curl. Either of the knurledcollars 43 is then snapped into the position corresponding to theposition of the upper guide fingers and finger extensions 39, shown inFIGURE 1a. The drives for the feed roller 24 and the lower feed roller99 are then actuated, with each of the rollers rotatingcounter-clockwise, and the tracing is fed between the feed roller 24 andthe cooperating feed roller 26, and is guided by the almost verticallydisposed finger extension 39 into a clockwise or back curl. The concaveguiding surfaces 87 of the lower guide fingers 83 guide the tracing in aclockwise direction and the rotating discs 103 on the lower feed rollerfeed the tracing into a roll, which is removed thereafter.

In order to feed the tracings in substantially flat form and the fronttray section 65. As indicated above, the

upper and lower guide fingers are pivoted by the manual actuation of theknurled collars 43 and 88, respectively. Upon actuating the feed roller24 (the lower feed roller 99 may be disengaged), the tracings 16 arefeed through the sheet rolling device to the receiving tray 22.

Desirably, when fed in sheet form, the tracings are slightly ribbed orcorrugatedto facilitate feeding to the receiving tray 22 of theduplicating machine whereat they are stacked in substantially flat form.Corrugating or ribbing is effected by raising the handles 58 of theupper assembly 57. of the sheet rolling device, and longitudinallydisplacing the upper assembly to its lower position in order that thefeed rings 25 on the feed roller 24 and the discs 27 on thecooperatingfeed roller 26 inter: mesh. When thus intermeshed, thetracings fed between the discs and the feed rings are ribbed as desired.

It will be noted that the present invention provides a sheet rollingdevice for rolling up sheet material with face or back curls or fordelivering same substantially fiat, according to the initialconfiguration of the sheet material, which is simple, convenient andefficient.

Since different embodiments of the invention may be made withoutdeparting from the scope thereof, it is intended that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

l. A sheet rolling device for rolling a sheet having a face curl toproduce a roll in which the sheet has a face curl and for rolling asheet having a back curl to produce a roll in which the sheet has a backcurl, comprising, in

combination, a guiding surface defining one side of a substantiallyunobstructed sheet rolling zone, a plurality of guide fingers havingguiding surfaces positioned in said sheet rolling zone opposite thefirst mentioned guiding surface, feed means for advancing a sheet intosaid sheet rolling zone between the guiding surfaces on said fingers andsaid first mentionedguiding surface, said guiding fingers beingpositionable in said rolling zone in one position for guiding said sheetto roll it up with a face curl and in a second position for guiding saidsheet toroll it'up with a back curl, a feed roller having its peripherydisposed adjacent the base portion of said rolling zone for frictionallyengaging and rolling up the sheet in one direction for forming a rollwith the rolled-up sheet having a face curl and being rotatable in theopposite direction for forming a roll with the rolled-up sheet having aback curl.

2. The device as defined in claim 1, in which said guide fingerscomprise a group of upper fingers and a group of lower fingers andincluding a supporting means for each group of fingers on which eachsaid group is mounted for pivotal movement.

53. The device as defined in claim 2, in which the supporting means 'forsaid group of upper fingers is mounted for pivotal movement to positionsaid upper fingers in a first position for guiding said sheet to roll itup with a face curl, in a second position for guiding said sheet to rollit up with a back curl, and in a third idle position allowing delivery.of said sheet in .substantially fiat form,

4. A sheet rolling devicefor sheets, which have passed through aduplicating machine, to roll upsaid sheets with a face curl in therolled sheet, with a back curl in the rolled sheet,or to deliver saidsheets substantially flat,

. 8 7 comprising in combination, an upper feed means for advancing saidsheets endwise in one direction, a plurality of spaced apart upper guidefingers disposed adjacent said upper feed means, a mounting element towhich each of said upper guide fingers is connected, a plurality offinger extensions each of which is pivotably connected to one of theupper guide fingers at the end of the guide finger remote from saidmounting element, said mount ing element being pivotablethrough at leastthree predetermined positions corresponding to the positions of saidupper guide fingers and finger extensions for guiding said sheets forrolling with face curls or back curls on said sheets orfor feeding samein-flat form, locking means provided on said mounting element forholding said mounting element in said predetermined positions, aplurality of spaced apart lower guide fingers each having a concaveguiding surface for said sheets, a pivotable supporting means to whichsaid lower guide fingers are connected, limit means on said supportingmeans for limiting the pivotal movement thereof, and avfeed rolleradjacent said pivotable supporting means cooperating with said upper andlower guide fingers forrolling said sheets fed by said feed meansbetween said fingers, said feed roller being rotatable in oppositedirections for rolling said sheets with face or back curls thereon.

5. The sheet rolling device of claim 4 in which said upper feed meansincludes an upper feed roller and a cooperating feed roller driventhereby, said upper and cooperating feed rollers each having aplurality. of spaced annular sheet engaging members thereon which arelaterally offset from one another and are adapted to feed said sheets asthey are advanced therebetween or to intermesh with one another forcorrugating said sheets.

.6. A sheet rolling device for sheets which have passed through aduplicating machine, for rolling sheets having face curls to providerolls in which the sheets have, face curls, for rolling sheets havingback curls to provide rolls in which the sheets have back curls, and fordelivering uncurled' sheets substantially flat, comprising, incombination, an upper assembly, an upper feed roller associated withsaid upper assembly, and a lower assembly; said upper assemblycomprising a rotatably mounted cooperating feed roller engaged anddriven by said upper feed roller, a pivotably mounted upper supportingmember, a plurality of spaced apart upper guide fingers fixedly mountedat their ends on said upper supporting member, and a plurality ofarcuate shaped finger extensions, each of which is pivotally connectedto one of the upper guide fingers at the end of the guide finger remotefrom said upper supporting member, said upper guide fingers positionablein one position for guiding said sheets to roll them up with a face curland positionable in another posi forming a roll with the rolled-up'sheet'having a face curl and being rotatable in the opposite directionfor forming a roll with the rolled-up sheet having aback curl.

7. The sheet rolling device defined in claim 6, in which said upperassembly is laterally and longitudinally displaceable with respect tosaid upper feed roller and both said upper feed roller and saidcooperating feed roller have spaced apart series of discs thereonadapted to intermesh with one another for slightly corrugating thesheets fed therebetween to facilitate feeding said sheets insubstantially fiat form throughout 'said device.

a 8. The sheet rolling device defined in claim 6, in which said uppersupport member is pivotable through at least three predeterminedpositions for positioning said upper guide fingers, to giude said sheetsto roll them up with face curls, to guide said sheets to roll them upwith 'back curls and to permit feeding said sheets substantially flat,said lower support member is pivotable through at least twopredetermined positions for positioning said lower guide fingers, toguide said sheets to roll them up with face or back curls and to permitfeeding said sheets substantially flat, locking means are providedassociated with the upper support member for holding said upper supportmember in at least said three predetermined positions, and limit meansare provided associated with the lower support member for restrictingthe pivotal movement of said lower support member between at least saidtwo predetermined positions.

9. A sheet rolling device for rolling a sheet having a face curl toproduce a roll in which the sheet has a face curl and for rolling asheet having a back curl to produce a roll in which the sheet has a backcurl, comprising, in combination, feed means for advancing a sheetendwise in one direction, a pivotably mounted upper support, a pluralityof spaced apart upper guide fingers, each of which is fixedly mounted atone end on said upper support, a plurality of finger extensions, each ofwhich is pivotably connected to one of the upper guide fingers at theend of the guide finger remote from said upper support, a pivotablymounted lower support, a plurality of spaced apart lower guide fingers,each of which is fixedly mounted at its end on said lower support andhas a concave guiding surface for guiding said sheet as it is rolled,and a feed roller positioned adjacent said lower support, said feedroller being rotatable in one direction for forming a roll with therolled-up sheet having a face curl and being rotatable in the oppositedirection for forming a roll with the rolled-up sheet having a backcurl.

10. A sheet rolling device for rolling sheets having face curls toprovide rolls in which the sheets have face curls, for rolling sheetshaving back curls to provide rolls in which the sheets have back curls,and for delivering uncurled sheets substantially flat, comprising, incombination, an upper assembly, an upper feed roller positioned adjacentsaid upper assembly, and a lower assembly; said upper assemblycomprising a pair of spaced supporting arms, a cooperating rollerrotatably mounted at each of its ends on one of said supporting arms andengaged with and driven by said upper feed roller, a mounting tubepivotably mounted at its ends on said supporting arms adjacent saidcooperating roller, a plurality of spaced apart upper guide fingersfixedly mounted at their ends on said mounting tube, a plurality ofarcuate shaped finger extensions, each of which is pivotably connectedto one of said upper guide fingers at the end of the guide finger remotefrom said mounting tube, and a setting block secured to one end of saidmounting t-ube adjacent one of said supporting arms for locking saidmounting tube in one position relative to said arms in which said upperguide fingers are positioned for guiding said sheets having face curlsto roll them up with a face curl, in another position in which saidupper guide fingers are positioned for guiding said sheets having backcurls to roll them up with a back curl and in a third position in whichsaid upper guide fingers permit substantially flat feeding of saiduncurled sheets; and said lower assembly comprising a pivotably mountedlower supporting member having its axis parallel to the axis of saidmounting tube, a plurality of spaced apart lower guide fingers fixedlymounted on said lower supporting member, each of which has a concaveguiding surface, a pair of stops associated with said lower supportingmember for restricting the pivotal movement thereof between twopre-determined positions in one of which said concave guiding surfacesare positioned for guiding said sheets as they are rolled, and a lowerfeed roller positioned adjacent and parallel to said lower supportingmember, said lower feed roller being rotatable in one direction forforming a roll with the rolled-up sheet having a face curl and beingrotatable in the opposite direction for forming a roll with the rolledupsheet having a back curl.

References Cited in the file of this patent UNITED STATES PATENTS2,179,011 Hudson Nov. 7, 1939 2,231,400 Washburn et al. Feb. 11, 19412,573,188 Dyken Oct. 30, 1951 2,646,231 Frielinghaus July 21, 19532,658,741 Schmidt et a1. Nov. 10, 1953 2,706,094 Dyken Apr. 12, 1955

1. A SHEET ROLLING DEVICE FOR ROLLING A SHEET HAVING A FACE CURL TOPRODUCE A ROLL IN WHICH THE SHEET HAS A FACE CURL AND FOR ROLLING ASHEET HAVING A BACK CURL TO PRODUCE A ROLL IN WHICH THE SHEET HAS A BACKCURL, COMPRISING, IN COMBINATION, A GUIDING SURFACE DEFINING ONE SIDE OFA SUBSTANTIALLY UNOBSTRUCTED SHEET ROLLING ZONE, A PLURALITY OF GUIDEFINGERS HAVING GUIDING SURFACES POSITIONED IN SAID SHEET ROLLING ZONEOPPOSITE THE FIRST MENTIONED GUIDING SURFACE, FEED MEANS FOR ADVANCING ASHEET INTO SAID SHEET ROLLING ZONE BETWEEN THE GUIDING SURFACES ON SAIDFINGERS AND SAID FIRST MENTIONED GUIDING SURFACE, SAID GUIDING FINGERSBEING POSITIONABLE IN SAID ROLLING ZONE IN ONE POSITION FOR GUIDING SAIDSHEET TO ROLL IT UP WITH A FACE CURL AND IN A SECOND POSITION FORGUIDING SAID SHEET TO ROLL IT UP WITH A BACK CURL, A FEED ROLLER HAVINGITS PERIPHERY DISPOSED ADJACENT THE BASE PORTION OF SAID ROLLING ZONEFOR FRICTIONALLY ENGAGING AND ROLLING UP THE SHEET IN ONE DIRECTION FORFORMING A ROLL WITH THE ROLLED-UP SHEET HAVING A FACE CURL AND BEINGROTATABLE IN THE OPPOSITE DIRECTION FOR FORMING A ROLL WITH THEROLLED-UP SHEET HAVING A BACK CURL.